head to head
Neither is simply harder - they are hard in different places. Apollo Justice: Ace Attorney demands more variance; Portal 2 demands more execution.

Optimization · Pure Optimization
Adds a visual-tell scanning system on top of the classic evidence-contradiction loop.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Apollo Justice: Ace Attorney leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Apollo Justice: Ace Attorney
Menu-only courtroom with no timing demands
Portal 2
Portal placement requires some precision but timing is lenient.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Apollo Justice: Ace Attorney
Witnesses are fully scripted; no adaptive element
Portal 2
No opponent; puzzles are static.
Apollo Justice: Ace Attorney leans clearly harder on variance.
Apollo Justice: Ace Attorney
Perceive system hides tells until the player scans testimony
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Apollo Justice: Ace Attorney
Pinpointing forged evidence and witness tells is a logic puzzle with one solution
Portal 2
Solving the puzzle's logic IS the entire game.
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.